diff options
Diffstat (limited to 'net/dsa/slave.c')
| -rw-r--r-- | net/dsa/slave.c | 1583 |
1 files changed, 1583 insertions, 0 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c new file mode 100644 index 000000000..f7c122357 --- /dev/null +++ b/net/dsa/slave.c @@ -0,0 +1,1583 @@ +/* + * net/dsa/slave.c - Slave device handling + * Copyright (c) 2008-2009 Marvell Semiconductor + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/list.h> +#include <linux/etherdevice.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include <linux/phy_fixed.h> +#include <linux/phylink.h> +#include <linux/of_net.h> +#include <linux/of_mdio.h> +#include <linux/mdio.h> +#include <net/rtnetlink.h> +#include <net/pkt_cls.h> +#include <net/tc_act/tc_mirred.h> +#include <linux/if_bridge.h> +#include <linux/netpoll.h> +#include <linux/ptp_classify.h> + +#include "dsa_priv.h" + +static bool dsa_slave_dev_check(struct net_device *dev); + +/* slave mii_bus handling ***************************************************/ +static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) +{ + struct dsa_switch *ds = bus->priv; + + if (ds->phys_mii_mask & (1 << addr)) + return ds->ops->phy_read(ds, addr, reg); + + return 0xffff; +} + +static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) +{ + struct dsa_switch *ds = bus->priv; + + if (ds->phys_mii_mask & (1 << addr)) + return ds->ops->phy_write(ds, addr, reg, val); + + return 0; +} + +void dsa_slave_mii_bus_init(struct dsa_switch *ds) +{ + ds->slave_mii_bus->priv = (void *)ds; + ds->slave_mii_bus->name = "dsa slave smi"; + ds->slave_mii_bus->read = dsa_slave_phy_read; + ds->slave_mii_bus->write = dsa_slave_phy_write; + snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", + ds->dst->index, ds->index); + ds->slave_mii_bus->parent = ds->dev; + ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; +} + + +/* slave device handling ****************************************************/ +static int dsa_slave_get_iflink(const struct net_device *dev) +{ + return dsa_slave_to_master(dev)->ifindex; +} + +static int dsa_slave_open(struct net_device *dev) +{ + struct net_device *master = dsa_slave_to_master(dev); + struct dsa_port *dp = dsa_slave_to_port(dev); + int err; + + if (!(master->flags & IFF_UP)) + return -ENETDOWN; + + if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { + err = dev_uc_add(master, dev->dev_addr); + if (err < 0) + goto out; + } + + if (dev->flags & IFF_ALLMULTI) { + err = dev_set_allmulti(master, 1); + if (err < 0) + goto del_unicast; + } + if (dev->flags & IFF_PROMISC) { + err = dev_set_promiscuity(master, 1); + if (err < 0) + goto clear_allmulti; + } + + err = dsa_port_enable(dp, dev->phydev); + if (err) + goto clear_promisc; + + phylink_start(dp->pl); + + return 0; + +clear_promisc: + if (dev->flags & IFF_PROMISC) + dev_set_promiscuity(master, -1); +clear_allmulti: + if (dev->flags & IFF_ALLMULTI) + dev_set_allmulti(master, -1); +del_unicast: + if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) + dev_uc_del(master, dev->dev_addr); +out: + return err; +} + +static int dsa_slave_close(struct net_device *dev) +{ + struct net_device *master = dsa_slave_to_master(dev); + struct dsa_port *dp = dsa_slave_to_port(dev); + + phylink_stop(dp->pl); + + dsa_port_disable(dp, dev->phydev); + + dev_mc_unsync(master, dev); + dev_uc_unsync(master, dev); + if (dev->flags & IFF_ALLMULTI) + dev_set_allmulti(master, -1); + if (dev->flags & IFF_PROMISC) + dev_set_promiscuity(master, -1); + + if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) + dev_uc_del(master, dev->dev_addr); + + return 0; +} + +static void dsa_slave_change_rx_flags(struct net_device *dev, int change) +{ + struct net_device *master = dsa_slave_to_master(dev); + if (dev->flags & IFF_UP) { + if (change & IFF_ALLMULTI) + dev_set_allmulti(master, + dev->flags & IFF_ALLMULTI ? 1 : -1); + if (change & IFF_PROMISC) + dev_set_promiscuity(master, + dev->flags & IFF_PROMISC ? 1 : -1); + } +} + +static void dsa_slave_set_rx_mode(struct net_device *dev) +{ + struct net_device *master = dsa_slave_to_master(dev); + + dev_mc_sync(master, dev); + dev_uc_sync(master, dev); +} + +static int dsa_slave_set_mac_address(struct net_device *dev, void *a) +{ + struct net_device *master = dsa_slave_to_master(dev); + struct sockaddr *addr = a; + int err; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + if (!(dev->flags & IFF_UP)) + goto out; + + if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { + err = dev_uc_add(master, addr->sa_data); + if (err < 0) + return err; + } + + if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) + dev_uc_del(master, dev->dev_addr); + +out: + ether_addr_copy(dev->dev_addr, addr->sa_data); + + return 0; +} + +struct dsa_slave_dump_ctx { + struct net_device *dev; + struct sk_buff *skb; + struct netlink_callback *cb; + int idx; +}; + +static int +dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, + bool is_static, void *data) +{ + struct dsa_slave_dump_ctx *dump = data; + u32 portid = NETLINK_CB(dump->cb->skb).portid; + u32 seq = dump->cb->nlh->nlmsg_seq; + struct nlmsghdr *nlh; + struct ndmsg *ndm; + + if (dump->idx < dump->cb->args[2]) + goto skip; + + nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, + sizeof(*ndm), NLM_F_MULTI); + if (!nlh) + return -EMSGSIZE; + + ndm = nlmsg_data(nlh); + ndm->ndm_family = AF_BRIDGE; + ndm->ndm_pad1 = 0; + ndm->ndm_pad2 = 0; + ndm->ndm_flags = NTF_SELF; + ndm->ndm_type = 0; + ndm->ndm_ifindex = dump->dev->ifindex; + ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; + + if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) + goto nla_put_failure; + + if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) + goto nla_put_failure; + + nlmsg_end(dump->skb, nlh); + +skip: + dump->idx++; + return 0; + +nla_put_failure: + nlmsg_cancel(dump->skb, nlh); + return -EMSGSIZE; +} + +static int +dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, + struct net_device *dev, struct net_device *filter_dev, + int *idx) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_slave_dump_ctx dump = { + .dev = dev, + .skb = skb, + .cb = cb, + .idx = *idx, + }; + int err; + + err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); + *idx = dump.idx; + + return err; +} + +static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_switch *ds = p->dp->ds; + int port = p->dp->index; + + /* Pass through to switch driver if it supports timestamping */ + switch (cmd) { + case SIOCGHWTSTAMP: + if (ds->ops->port_hwtstamp_get) + return ds->ops->port_hwtstamp_get(ds, port, ifr); + break; + case SIOCSHWTSTAMP: + if (ds->ops->port_hwtstamp_set) + return ds->ops->port_hwtstamp_set(ds, port, ifr); + break; + } + + return phylink_mii_ioctl(p->dp->pl, ifr, cmd); +} + +static int dsa_slave_port_attr_set(struct net_device *dev, + const struct switchdev_attr *attr, + struct switchdev_trans *trans) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + int ret; + + switch (attr->id) { + case SWITCHDEV_ATTR_ID_PORT_STP_STATE: + ret = dsa_port_set_state(dp, attr->u.stp_state, trans); + break; + case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: + ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, + trans); + break; + case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: + ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); + break; + default: + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + +static int dsa_slave_port_obj_add(struct net_device *dev, + const struct switchdev_obj *obj, + struct switchdev_trans *trans) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + int err; + + /* For the prepare phase, ensure the full set of changes is feasable in + * one go in order to signal a failure properly. If an operation is not + * supported, return -EOPNOTSUPP. + */ + + switch (obj->id) { + case SWITCHDEV_OBJ_ID_PORT_MDB: + err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); + break; + case SWITCHDEV_OBJ_ID_HOST_MDB: + /* DSA can directly translate this to a normal MDB add, + * but on the CPU port. + */ + err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj), + trans); + break; + case SWITCHDEV_OBJ_ID_PORT_VLAN: + err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), + trans); + break; + default: + err = -EOPNOTSUPP; + break; + } + + return err; +} + +static int dsa_slave_port_obj_del(struct net_device *dev, + const struct switchdev_obj *obj) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + int err; + + switch (obj->id) { + case SWITCHDEV_OBJ_ID_PORT_MDB: + err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); + break; + case SWITCHDEV_OBJ_ID_HOST_MDB: + /* DSA can directly translate this to a normal MDB add, + * but on the CPU port. + */ + err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); + break; + case SWITCHDEV_OBJ_ID_PORT_VLAN: + err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); + break; + default: + err = -EOPNOTSUPP; + break; + } + + return err; +} + +static int dsa_slave_port_attr_get(struct net_device *dev, + struct switchdev_attr *attr) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + struct dsa_switch_tree *dst = ds->dst; + + switch (attr->id) { + case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: + attr->u.ppid.id_len = sizeof(dst->index); + memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len); + break; + case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT: + attr->u.brport_flags_support = 0; + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, + struct sk_buff *skb) +{ +#ifdef CONFIG_NET_POLL_CONTROLLER + struct dsa_slave_priv *p = netdev_priv(dev); + + if (p->netpoll) + netpoll_send_skb(p->netpoll, skb); +#else + BUG(); +#endif + return NETDEV_TX_OK; +} + +static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, + struct sk_buff *skb) +{ + struct dsa_switch *ds = p->dp->ds; + struct sk_buff *clone; + unsigned int type; + + type = ptp_classify_raw(skb); + if (type == PTP_CLASS_NONE) + return; + + if (!ds->ops->port_txtstamp) + return; + + clone = skb_clone_sk(skb); + if (!clone) + return; + + if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) + return; + + kfree_skb(clone); +} + +static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct pcpu_sw_netstats *s; + struct sk_buff *nskb; + + s = this_cpu_ptr(p->stats64); + u64_stats_update_begin(&s->syncp); + s->tx_packets++; + s->tx_bytes += skb->len; + u64_stats_update_end(&s->syncp); + + /* Identify PTP protocol packets, clone them, and pass them to the + * switch driver + */ + dsa_skb_tx_timestamp(p, skb); + + /* Transmit function may have to reallocate the original SKB, + * in which case it must have freed it. Only free it here on error. + */ + nskb = p->xmit(skb, dev); + if (!nskb) { + kfree_skb(skb); + return NETDEV_TX_OK; + } + + /* SKB for netpoll still need to be mangled with the protocol-specific + * tag to be successfully transmitted + */ + if (unlikely(netpoll_tx_running(dev))) + return dsa_slave_netpoll_send_skb(dev, nskb); + + /* Queue the SKB for transmission on the parent interface, but + * do not modify its EtherType + */ + nskb->dev = dsa_slave_to_master(dev); + dev_queue_xmit(nskb); + + return NETDEV_TX_OK; +} + +/* ethtool operations *******************************************************/ + +static void dsa_slave_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *drvinfo) +{ + strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); + strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); + strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); +} + +static int dsa_slave_get_regs_len(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (ds->ops->get_regs_len) + return ds->ops->get_regs_len(ds, dp->index); + + return -EOPNOTSUPP; +} + +static void +dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (ds->ops->get_regs) + ds->ops->get_regs(ds, dp->index, regs, _p); +} + +static int dsa_slave_nway_reset(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_nway_reset(dp->pl); +} + +static int dsa_slave_get_eeprom_len(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (ds->cd && ds->cd->eeprom_len) + return ds->cd->eeprom_len; + + if (ds->ops->get_eeprom_len) + return ds->ops->get_eeprom_len(ds); + + return 0; +} + +static int dsa_slave_get_eeprom(struct net_device *dev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (ds->ops->get_eeprom) + return ds->ops->get_eeprom(ds, eeprom, data); + + return -EOPNOTSUPP; +} + +static int dsa_slave_set_eeprom(struct net_device *dev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (ds->ops->set_eeprom) + return ds->ops->set_eeprom(ds, eeprom, data); + + return -EOPNOTSUPP; +} + +static void dsa_slave_get_strings(struct net_device *dev, + uint32_t stringset, uint8_t *data) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (stringset == ETH_SS_STATS) { + int len = ETH_GSTRING_LEN; + + strncpy(data, "tx_packets", len); + strncpy(data + len, "tx_bytes", len); + strncpy(data + 2 * len, "rx_packets", len); + strncpy(data + 3 * len, "rx_bytes", len); + if (ds->ops->get_strings) + ds->ops->get_strings(ds, dp->index, stringset, + data + 4 * len); + } +} + +static void dsa_slave_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, + uint64_t *data) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_switch *ds = dp->ds; + struct pcpu_sw_netstats *s; + unsigned int start; + int i; + + for_each_possible_cpu(i) { + u64 tx_packets, tx_bytes, rx_packets, rx_bytes; + + s = per_cpu_ptr(p->stats64, i); + do { + start = u64_stats_fetch_begin_irq(&s->syncp); + tx_packets = s->tx_packets; + tx_bytes = s->tx_bytes; + rx_packets = s->rx_packets; + rx_bytes = s->rx_bytes; + } while (u64_stats_fetch_retry_irq(&s->syncp, start)); + data[0] += tx_packets; + data[1] += tx_bytes; + data[2] += rx_packets; + data[3] += rx_bytes; + } + if (ds->ops->get_ethtool_stats) + ds->ops->get_ethtool_stats(ds, dp->index, data + 4); +} + +static int dsa_slave_get_sset_count(struct net_device *dev, int sset) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (sset == ETH_SS_STATS) { + int count = 0; + + if (ds->ops->get_sset_count) { + count = ds->ops->get_sset_count(ds, dp->index, sset); + if (count < 0) + return count; + } + + return count + 4; + } + + return -EOPNOTSUPP; +} + +static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + phylink_ethtool_get_wol(dp->pl, w); + + if (ds->ops->get_wol) + ds->ops->get_wol(ds, dp->index, w); +} + +static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + int ret = -EOPNOTSUPP; + + phylink_ethtool_set_wol(dp->pl, w); + + if (ds->ops->set_wol) + ret = ds->ops->set_wol(ds, dp->index, w); + + return ret; +} + +static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + int ret; + + /* Port's PHY and MAC both need to be EEE capable */ + if (!dev->phydev || !dp->pl) + return -ENODEV; + + if (!ds->ops->set_mac_eee) + return -EOPNOTSUPP; + + ret = ds->ops->set_mac_eee(ds, dp->index, e); + if (ret) + return ret; + + return phylink_ethtool_set_eee(dp->pl, e); +} + +static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + int ret; + + /* Port's PHY and MAC both need to be EEE capable */ + if (!dev->phydev || !dp->pl) + return -ENODEV; + + if (!ds->ops->get_mac_eee) + return -EOPNOTSUPP; + + ret = ds->ops->get_mac_eee(ds, dp->index, e); + if (ret) + return ret; + + return phylink_ethtool_get_eee(dp->pl, e); +} + +static int dsa_slave_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_ksettings_get(dp->pl, cmd); +} + +static int dsa_slave_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_ksettings_set(dp->pl, cmd); +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static int dsa_slave_netpoll_setup(struct net_device *dev, + struct netpoll_info *ni) +{ + struct net_device *master = dsa_slave_to_master(dev); + struct dsa_slave_priv *p = netdev_priv(dev); + struct netpoll *netpoll; + int err = 0; + + netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); + if (!netpoll) + return -ENOMEM; + + err = __netpoll_setup(netpoll, master); + if (err) { + kfree(netpoll); + goto out; + } + + p->netpoll = netpoll; +out: + return err; +} + +static void dsa_slave_netpoll_cleanup(struct net_device *dev) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct netpoll *netpoll = p->netpoll; + + if (!netpoll) + return; + + p->netpoll = NULL; + + __netpoll_free_async(netpoll); +} + +static void dsa_slave_poll_controller(struct net_device *dev) +{ +} +#endif + +static int dsa_slave_get_phys_port_name(struct net_device *dev, + char *name, size_t len) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + if (snprintf(name, len, "p%d", dp->index) >= len) + return -EINVAL; + + return 0; +} + +static struct dsa_mall_tc_entry * +dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_mall_tc_entry *mall_tc_entry; + + list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) + if (mall_tc_entry->cookie == cookie) + return mall_tc_entry; + + return NULL; +} + +static int dsa_slave_add_cls_matchall(struct net_device *dev, + struct tc_cls_matchall_offload *cls, + bool ingress) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_mall_tc_entry *mall_tc_entry; + __be16 protocol = cls->common.protocol; + struct dsa_switch *ds = dp->ds; + struct net_device *to_dev; + const struct tc_action *a; + struct dsa_port *to_dp; + int err = -EOPNOTSUPP; + + if (!ds->ops->port_mirror_add) + return err; + + if (!tcf_exts_has_one_action(cls->exts)) + return err; + + a = tcf_exts_first_action(cls->exts); + + if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { + struct dsa_mall_mirror_tc_entry *mirror; + + to_dev = tcf_mirred_dev(a); + if (!to_dev) + return -EINVAL; + + if (!dsa_slave_dev_check(to_dev)) + return -EOPNOTSUPP; + + mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); + if (!mall_tc_entry) + return -ENOMEM; + + mall_tc_entry->cookie = cls->cookie; + mall_tc_entry->type = DSA_PORT_MALL_MIRROR; + mirror = &mall_tc_entry->mirror; + + to_dp = dsa_slave_to_port(to_dev); + + mirror->to_local_port = to_dp->index; + mirror->ingress = ingress; + + err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); + if (err) { + kfree(mall_tc_entry); + return err; + } + + list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); + } + + return 0; +} + +static void dsa_slave_del_cls_matchall(struct net_device *dev, + struct tc_cls_matchall_offload *cls) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_mall_tc_entry *mall_tc_entry; + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->port_mirror_del) + return; + + mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); + if (!mall_tc_entry) + return; + + list_del(&mall_tc_entry->list); + + switch (mall_tc_entry->type) { + case DSA_PORT_MALL_MIRROR: + ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror); + break; + default: + WARN_ON(1); + } + + kfree(mall_tc_entry); +} + +static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, + struct tc_cls_matchall_offload *cls, + bool ingress) +{ + if (cls->common.chain_index) + return -EOPNOTSUPP; + + switch (cls->command) { + case TC_CLSMATCHALL_REPLACE: + return dsa_slave_add_cls_matchall(dev, cls, ingress); + case TC_CLSMATCHALL_DESTROY: + dsa_slave_del_cls_matchall(dev, cls); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, + void *cb_priv, bool ingress) +{ + struct net_device *dev = cb_priv; + + if (!tc_can_offload(dev)) + return -EOPNOTSUPP; + + switch (type) { + case TC_SETUP_CLSMATCHALL: + return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); + default: + return -EOPNOTSUPP; + } +} + +static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, + void *type_data, void *cb_priv) +{ + return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); +} + +static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, + void *type_data, void *cb_priv) +{ + return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); +} + +static int dsa_slave_setup_tc_block(struct net_device *dev, + struct tc_block_offload *f) +{ + tc_setup_cb_t *cb; + + if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) + cb = dsa_slave_setup_tc_block_cb_ig; + else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS) + cb = dsa_slave_setup_tc_block_cb_eg; + else + return -EOPNOTSUPP; + + switch (f->command) { + case TC_BLOCK_BIND: + return tcf_block_cb_register(f->block, cb, dev, dev, f->extack); + case TC_BLOCK_UNBIND: + tcf_block_cb_unregister(f->block, cb, dev); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, + void *type_data) +{ + switch (type) { + case TC_SETUP_BLOCK: + return dsa_slave_setup_tc_block(dev, type_data); + default: + return -EOPNOTSUPP; + } +} + +static void dsa_slave_get_stats64(struct net_device *dev, + struct rtnl_link_stats64 *stats) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct pcpu_sw_netstats *s; + unsigned int start; + int i; + + netdev_stats_to_stats64(stats, &dev->stats); + for_each_possible_cpu(i) { + u64 tx_packets, tx_bytes, rx_packets, rx_bytes; + + s = per_cpu_ptr(p->stats64, i); + do { + start = u64_stats_fetch_begin_irq(&s->syncp); + tx_packets = s->tx_packets; + tx_bytes = s->tx_bytes; + rx_packets = s->rx_packets; + rx_bytes = s->rx_bytes; + } while (u64_stats_fetch_retry_irq(&s->syncp, start)); + + stats->tx_packets += tx_packets; + stats->tx_bytes += tx_bytes; + stats->rx_packets += rx_packets; + stats->rx_bytes += rx_bytes; + } +} + +static int dsa_slave_get_rxnfc(struct net_device *dev, + struct ethtool_rxnfc *nfc, u32 *rule_locs) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->get_rxnfc) + return -EOPNOTSUPP; + + return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); +} + +static int dsa_slave_set_rxnfc(struct net_device *dev, + struct ethtool_rxnfc *nfc) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->set_rxnfc) + return -EOPNOTSUPP; + + return ds->ops->set_rxnfc(ds, dp->index, nfc); +} + +static int dsa_slave_get_ts_info(struct net_device *dev, + struct ethtool_ts_info *ts) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_switch *ds = p->dp->ds; + + if (!ds->ops->get_ts_info) + return -EOPNOTSUPP; + + return ds->ops->get_ts_info(ds, p->dp->index, ts); +} + +static const struct ethtool_ops dsa_slave_ethtool_ops = { + .get_drvinfo = dsa_slave_get_drvinfo, + .get_regs_len = dsa_slave_get_regs_len, + .get_regs = dsa_slave_get_regs, + .nway_reset = dsa_slave_nway_reset, + .get_link = ethtool_op_get_link, + .get_eeprom_len = dsa_slave_get_eeprom_len, + .get_eeprom = dsa_slave_get_eeprom, + .set_eeprom = dsa_slave_set_eeprom, + .get_strings = dsa_slave_get_strings, + .get_ethtool_stats = dsa_slave_get_ethtool_stats, + .get_sset_count = dsa_slave_get_sset_count, + .set_wol = dsa_slave_set_wol, + .get_wol = dsa_slave_get_wol, + .set_eee = dsa_slave_set_eee, + .get_eee = dsa_slave_get_eee, + .get_link_ksettings = dsa_slave_get_link_ksettings, + .set_link_ksettings = dsa_slave_set_link_ksettings, + .get_rxnfc = dsa_slave_get_rxnfc, + .set_rxnfc = dsa_slave_set_rxnfc, + .get_ts_info = dsa_slave_get_ts_info, +}; + +/* legacy way, bypassing the bridge *****************************************/ +int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, u16 vid, + u16 flags) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return dsa_port_fdb_add(dp, addr, vid); +} + +int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], + struct net_device *dev, + const unsigned char *addr, u16 vid) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return dsa_port_fdb_del(dp, addr, vid); +} + +static const struct net_device_ops dsa_slave_netdev_ops = { + .ndo_open = dsa_slave_open, + .ndo_stop = dsa_slave_close, + .ndo_start_xmit = dsa_slave_xmit, + .ndo_change_rx_flags = dsa_slave_change_rx_flags, + .ndo_set_rx_mode = dsa_slave_set_rx_mode, + .ndo_set_mac_address = dsa_slave_set_mac_address, + .ndo_fdb_add = dsa_legacy_fdb_add, + .ndo_fdb_del = dsa_legacy_fdb_del, + .ndo_fdb_dump = dsa_slave_fdb_dump, + .ndo_do_ioctl = dsa_slave_ioctl, + .ndo_get_iflink = dsa_slave_get_iflink, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_netpoll_setup = dsa_slave_netpoll_setup, + .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, + .ndo_poll_controller = dsa_slave_poll_controller, +#endif + .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, + .ndo_setup_tc = dsa_slave_setup_tc, + .ndo_get_stats64 = dsa_slave_get_stats64, +}; + +static const struct switchdev_ops dsa_slave_switchdev_ops = { + .switchdev_port_attr_get = dsa_slave_port_attr_get, + .switchdev_port_attr_set = dsa_slave_port_attr_set, + .switchdev_port_obj_add = dsa_slave_port_obj_add, + .switchdev_port_obj_del = dsa_slave_port_obj_del, +}; + +static struct device_type dsa_type = { + .name = "dsa", +}; + +static void dsa_slave_phylink_validate(struct net_device *dev, + unsigned long *supported, + struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_validate) + return; + + ds->ops->phylink_validate(ds, dp->index, supported, state); +} + +static int dsa_slave_phylink_mac_link_state(struct net_device *dev, + struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + /* Only called for SGMII and 802.3z */ + if (!ds->ops->phylink_mac_link_state) + return -EOPNOTSUPP; + + return ds->ops->phylink_mac_link_state(ds, dp->index, state); +} + +static void dsa_slave_phylink_mac_config(struct net_device *dev, + unsigned int mode, + const struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_config) + return; + + ds->ops->phylink_mac_config(ds, dp->index, mode, state); +} + +static void dsa_slave_phylink_mac_an_restart(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_an_restart) + return; + + ds->ops->phylink_mac_an_restart(ds, dp->index); +} + +static void dsa_slave_phylink_mac_link_down(struct net_device *dev, + unsigned int mode, + phy_interface_t interface) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_link_down) { + if (ds->ops->adjust_link && dev->phydev) + ds->ops->adjust_link(ds, dp->index, dev->phydev); + return; + } + + ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); +} + +static void dsa_slave_phylink_mac_link_up(struct net_device *dev, + unsigned int mode, + phy_interface_t interface, + struct phy_device *phydev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_link_up) { + if (ds->ops->adjust_link && dev->phydev) + ds->ops->adjust_link(ds, dp->index, dev->phydev); + return; + } + + ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev); +} + +static const struct phylink_mac_ops dsa_slave_phylink_mac_ops = { + .validate = dsa_slave_phylink_validate, + .mac_link_state = dsa_slave_phylink_mac_link_state, + .mac_config = dsa_slave_phylink_mac_config, + .mac_an_restart = dsa_slave_phylink_mac_an_restart, + .mac_link_down = dsa_slave_phylink_mac_link_down, + .mac_link_up = dsa_slave_phylink_mac_link_up, +}; + +void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) +{ + const struct dsa_port *dp = dsa_to_port(ds, port); + + phylink_mac_change(dp->pl, up); +} +EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); + +static void dsa_slave_phylink_fixed_state(struct net_device *dev, + struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + /* No need to check that this operation is valid, the callback would + * not be called if it was not. + */ + ds->ops->phylink_fixed_state(ds, dp->index, state); +} + +/* slave device setup *******************************************************/ +static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) +{ + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + struct dsa_switch *ds = dp->ds; + + slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); + if (!slave_dev->phydev) { + netdev_err(slave_dev, "no phy at %d\n", addr); + return -ENODEV; + } + + return phylink_connect_phy(dp->pl, slave_dev->phydev); +} + +static int dsa_slave_phy_setup(struct net_device *slave_dev) +{ + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + struct device_node *port_dn = dp->dn; + struct dsa_switch *ds = dp->ds; + u32 phy_flags = 0; + int mode, ret; + + mode = of_get_phy_mode(port_dn); + if (mode < 0) + mode = PHY_INTERFACE_MODE_NA; + + dp->pl = phylink_create(slave_dev, of_fwnode_handle(port_dn), mode, + &dsa_slave_phylink_mac_ops); + if (IS_ERR(dp->pl)) { + netdev_err(slave_dev, + "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); + return PTR_ERR(dp->pl); + } + + /* Register only if the switch provides such a callback, since this + * callback takes precedence over polling the link GPIO in PHYLINK + * (see phylink_get_fixed_state). + */ + if (ds->ops->phylink_fixed_state) + phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state); + + if (ds->ops->get_phy_flags) + phy_flags = ds->ops->get_phy_flags(ds, dp->index); + + ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); + if (ret == -ENODEV && ds->slave_mii_bus) { + /* We could not connect to a designated PHY or SFP, so try to + * use the switch internal MDIO bus instead + */ + ret = dsa_slave_phy_connect(slave_dev, dp->index); + } + if (ret) { + netdev_err(slave_dev, "failed to connect to PHY: %pe\n", + ERR_PTR(ret)); + phylink_destroy(dp->pl); + } + + return ret; +} + +static struct lock_class_key dsa_slave_netdev_xmit_lock_key; +static void dsa_slave_set_lockdep_class_one(struct net_device *dev, + struct netdev_queue *txq, + void *_unused) +{ + lockdep_set_class(&txq->_xmit_lock, + &dsa_slave_netdev_xmit_lock_key); +} + +int dsa_slave_suspend(struct net_device *slave_dev) +{ + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + + if (!netif_running(slave_dev)) + return 0; + + netif_device_detach(slave_dev); + + rtnl_lock(); + phylink_stop(dp->pl); + rtnl_unlock(); + + return 0; +} + +int dsa_slave_resume(struct net_device *slave_dev) +{ + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + + if (!netif_running(slave_dev)) + return 0; + + netif_device_attach(slave_dev); + + rtnl_lock(); + phylink_start(dp->pl); + rtnl_unlock(); + + return 0; +} + +static void dsa_slave_notify(struct net_device *dev, unsigned long val) +{ + struct net_device *master = dsa_slave_to_master(dev); + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_notifier_register_info rinfo = { + .switch_number = dp->ds->index, + .port_number = dp->index, + .master = master, + .info.dev = dev, + }; + + call_dsa_notifiers(val, dev, &rinfo.info); +} + +int dsa_slave_create(struct dsa_port *port) +{ + const struct dsa_port *cpu_dp = port->cpu_dp; + struct net_device *master = cpu_dp->master; + struct dsa_switch *ds = port->ds; + const char *name = port->name; + struct net_device *slave_dev; + struct dsa_slave_priv *p; + int ret; + + if (!ds->num_tx_queues) + ds->num_tx_queues = 1; + + slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, + NET_NAME_UNKNOWN, ether_setup, + ds->num_tx_queues, 1); + if (slave_dev == NULL) + return -ENOMEM; + + slave_dev->features = master->vlan_features | NETIF_F_HW_TC; + slave_dev->hw_features |= NETIF_F_HW_TC; + slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; + if (port->mac && is_valid_ether_addr(port->mac)) + ether_addr_copy(slave_dev->dev_addr, port->mac); + else + eth_hw_addr_inherit(slave_dev, master); + slave_dev->priv_flags |= IFF_NO_QUEUE; + slave_dev->netdev_ops = &dsa_slave_netdev_ops; + slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; + slave_dev->min_mtu = 0; + slave_dev->max_mtu = ETH_MAX_MTU; + SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); + + netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, + NULL); + + SET_NETDEV_DEV(slave_dev, port->ds->dev); + slave_dev->dev.of_node = port->dn; + slave_dev->vlan_features = master->vlan_features; + + p = netdev_priv(slave_dev); + p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); + if (!p->stats64) { + free_netdev(slave_dev); + return -ENOMEM; + } + + ret = gro_cells_init(&p->gcells, slave_dev); + if (ret) + goto out_free; + + p->dp = port; + INIT_LIST_HEAD(&p->mall_tc_list); + p->xmit = cpu_dp->tag_ops->xmit; + port->slave = slave_dev; + + netif_carrier_off(slave_dev); + + ret = dsa_slave_phy_setup(slave_dev); + if (ret) { + netdev_err(master, "error %d setting up slave phy\n", ret); + goto out_gcells; + } + + dsa_slave_notify(slave_dev, DSA_PORT_REGISTER); + + ret = register_netdev(slave_dev); + if (ret) { + netdev_err(master, "error %d registering interface %s\n", + ret, slave_dev->name); + goto out_phy; + } + + return 0; + +out_phy: + rtnl_lock(); + phylink_disconnect_phy(p->dp->pl); + rtnl_unlock(); + phylink_destroy(p->dp->pl); +out_gcells: + gro_cells_destroy(&p->gcells); +out_free: + free_percpu(p->stats64); + free_netdev(slave_dev); + port->slave = NULL; + return ret; +} + +void dsa_slave_destroy(struct net_device *slave_dev) +{ + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + struct dsa_slave_priv *p = netdev_priv(slave_dev); + + netif_carrier_off(slave_dev); + rtnl_lock(); + phylink_disconnect_phy(dp->pl); + rtnl_unlock(); + + dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); + unregister_netdev(slave_dev); + phylink_destroy(dp->pl); + gro_cells_destroy(&p->gcells); + free_percpu(p->stats64); + free_netdev(slave_dev); +} + +static bool dsa_slave_dev_check(struct net_device *dev) +{ + return dev->netdev_ops == &dsa_slave_netdev_ops; +} + +static int dsa_slave_changeupper(struct net_device *dev, + struct netdev_notifier_changeupper_info *info) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + int err = NOTIFY_DONE; + + if (netif_is_bridge_master(info->upper_dev)) { + if (info->linking) { + err = dsa_port_bridge_join(dp, info->upper_dev); + err = notifier_from_errno(err); + } else { + dsa_port_bridge_leave(dp, info->upper_dev); + err = NOTIFY_OK; + } + } + + return err; +} + +static int dsa_slave_netdevice_event(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + + if (!dsa_slave_dev_check(dev)) + return NOTIFY_DONE; + + if (event == NETDEV_CHANGEUPPER) + return dsa_slave_changeupper(dev, ptr); + + return NOTIFY_DONE; +} + +struct dsa_switchdev_event_work { + struct work_struct work; + struct switchdev_notifier_fdb_info fdb_info; + struct net_device *dev; + unsigned long event; +}; + +static void dsa_slave_switchdev_event_work(struct work_struct *work) +{ + struct dsa_switchdev_event_work *switchdev_work = + container_of(work, struct dsa_switchdev_event_work, work); + struct net_device *dev = switchdev_work->dev; + struct switchdev_notifier_fdb_info *fdb_info; + struct dsa_port *dp = dsa_slave_to_port(dev); + int err; + + rtnl_lock(); + switch (switchdev_work->event) { + case SWITCHDEV_FDB_ADD_TO_DEVICE: + fdb_info = &switchdev_work->fdb_info; + if (!fdb_info->added_by_user) + break; + + err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid); + if (err) { + netdev_dbg(dev, "fdb add failed err=%d\n", err); + break; + } + call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev, + &fdb_info->info); + break; + + case SWITCHDEV_FDB_DEL_TO_DEVICE: + fdb_info = &switchdev_work->fdb_info; + if (!fdb_info->added_by_user) + break; + + err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid); + if (err) { + netdev_dbg(dev, "fdb del failed err=%d\n", err); + dev_close(dev); + } + break; + } + rtnl_unlock(); + + kfree(switchdev_work->fdb_info.addr); + kfree(switchdev_work); + dev_put(dev); +} + +static int +dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work * + switchdev_work, + const struct switchdev_notifier_fdb_info * + fdb_info) +{ + memcpy(&switchdev_work->fdb_info, fdb_info, + sizeof(switchdev_work->fdb_info)); + switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); + if (!switchdev_work->fdb_info.addr) + return -ENOMEM; + ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, + fdb_info->addr); + return 0; +} + +/* Called under rcu_read_lock() */ +static int dsa_slave_switchdev_event(struct notifier_block *unused, + unsigned long event, void *ptr) +{ + struct net_device *dev = switchdev_notifier_info_to_dev(ptr); + struct dsa_switchdev_event_work *switchdev_work; + + if (!dsa_slave_dev_check(dev)) + return NOTIFY_DONE; + + switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); + if (!switchdev_work) + return NOTIFY_BAD; + + INIT_WORK(&switchdev_work->work, + dsa_slave_switchdev_event_work); + switchdev_work->dev = dev; + switchdev_work->event = event; + + switch (event) { + case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */ + case SWITCHDEV_FDB_DEL_TO_DEVICE: + if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr)) + goto err_fdb_work_init; + dev_hold(dev); + break; + default: + kfree(switchdev_work); + return NOTIFY_DONE; + } + + dsa_schedule_work(&switchdev_work->work); + return NOTIFY_OK; + +err_fdb_work_init: + kfree(switchdev_work); + return NOTIFY_BAD; +} + +static struct notifier_block dsa_slave_nb __read_mostly = { + .notifier_call = dsa_slave_netdevice_event, +}; + +static struct notifier_block dsa_slave_switchdev_notifier = { + .notifier_call = dsa_slave_switchdev_event, +}; + +int dsa_slave_register_notifier(void) +{ + int err; + + err = register_netdevice_notifier(&dsa_slave_nb); + if (err) + return err; + + err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); + if (err) + goto err_switchdev_nb; + + return 0; + +err_switchdev_nb: + unregister_netdevice_notifier(&dsa_slave_nb); + return err; +} + +void dsa_slave_unregister_notifier(void) +{ + int err; + + err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); + if (err) + pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); + + err = unregister_netdevice_notifier(&dsa_slave_nb); + if (err) + pr_err("DSA: failed to unregister slave notifier (%d)\n", err); +} |